Rolled color separation film for box cameras and the like



Oct. 19, 1943. A. SCHUSTERMAN 2,332,474

ROLLED COLOR SEPARATION FILM FOR BOX CAMERAS AND THE LIKE FiIed'NOV. l5 1941 1 ""llllliillllll ll lilllli BY P ATTORNEY Patented Oct. 19, 1943 NITED STATES PATENT OFFICE ROLLED COLOR SEPARATION FILM FOR BOX CAMERAS AND THE LIKE Adolph Schusterman, New York, N. Y.

Application November 15, 1941, Serial No. 419,236

3 Claims.

This invention relates to new and useful improvements in rolled color separation film for box cameras and the like for making natural color photographs.

More specifically, the invention proposes the construction of a roll of color separating film embodying the required properties for taking natural color photographs with a conventionally constructedbox camera.

Still further, it is proposed to characterize the roll of color separation film by a backing sheet designed to act as a lead and backing strip and upon which superimposed strips of film are mounted with their emulsion sides contacting each other in a manner to permit the red colored back side of one of the films (preferably Verichrome (orthochromatic) film) to act as a filter for both of the films.

A further object of the invention proposes certain novel means for mounting the superimposed film strips upon the backing sheet in a manner to insure the proper advancement of both of the film strips simultaneously.

A still further object of the invention is the construction of separation film for taking natural color photographs, as mentioned, which may be developed and used for printing natural color pic tures according to known processes.

Another object of the invention is the construction of a roll of color separation film which is simple and durable and which may be manufactured and sold at a reasonable price.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part of this disclosure: I

Fig. 1 is a side elevational view of a conventionally constructed box camera having a portion thereof broken away to illustrate the application of a color separation film constructed in accordance with this invention.

Fig, 2 is a perspective view illustrating the method of applying a color separation film to a film spool.

Fig. 3 is a perspective view somewhat similar to that of Fig. 2, but illustrating a further step in winding the color separation film upon the Fig. 4 is an enlarged perspective view of a portion of Fig. 3.

Fig. 5 is a partial longitudinal sectional view taken on the line 5-5 of Fig. 4.

Fig. 6 is a vertical sectional view taken on the line 6-6 of Fig. 5.

Fig. 7 is a view similar to Fig. 4, but illustrating a modified form of the invention.

Fig. 8 is a. view of the portions of the color separation film shown in Fig. 7 separated and in perspective.

Fig. 9 is a partial longitudinal sectional view taken on the line 9-9 of Fig. 7.

The roll of color separation film constructed in accordance with this invention, is to be used in combination with the conventionally constructed box camera I0 having a lens II. The

interior of the camera is provided with a conventional means for supporting the film spools l2 and rollers I3 over which the film is extended at the back of the camera. The camera I0 is also provided with the usual means for turning one of the spools I2 to advance the film, which means is not shown on the drawing as it forms no part of this invention.

The color separation film according to this invention, includes a three layer roll l4 wound upon one of the spools l2. The layers of the roll I4 consists of an opaque protective lead and backing strip I5. This backing strip is of the type generally used for backing panchromatic film.

Superimposed upon the backing strip I5 there is mounted a strip of panchromatic film I 6, This strip of panchromatic film has its emulsion side l1 turned away from the backing strip to be exposed towards the lens ll of the camera in.

Superimposed upon the strip of panchromatic film Hi there is mounted a strip of Verichrome (orthochromatic) film Hi. The strip of (orthochromatic) film l8 has its emulsion side l9 turned away from the lens H of the camera In causing the emulsion sides of the films I6 and I8 to be immediately adjacent one another.

Novel means is provided for attaching the ends for positioning the films upon the spool I2. The

process used consists in first attaching one end of the backing strip I5 to the spool. Then one pair of adjacent ends of the films I6 and I8 is secured together by the ends are secured to the backing strip I! by the tape 2|. The backing strip I5 and the films are then rolled upon the spool I2 until the free ends of the films are reached. The free ends of the films I8 and I 8 are'then secured together and these joined ends are then attached to the backing strip I5 and the rolling is finished, completing the application of the color separating film to the spool I2.

With the Verichrome (orthochromatic) film placed in front of the panchromatic film IS, with the emulsion sides of the films together, the red backing on the Verichrome (orthochromatic) film I8 acts as a filter for both the Verichrome (orthochromatic) film I8 and the panchromatic film IS.

The Verichrome (orthochromatic) film I8 is sensitive to blue light but not red light. The panchromatic film I6, on the other hand, is sensitive to red light. Consequently, the Verichrome (orthochromatic) film I8 is the redprinter and panchromatic film I6 is the blue printer, as the color to which the particular film is sensitive to, turns black when the film is exposed and cannot be printed.

The method of using the color separationfilm in accordance with this invention is as follows:

A roll of film having the dual films I8 and I8 is purchased in the usual manner and is mounted in position within a conventional box camera III. The sections of the film are exposed in the usual manner and the completely exposed film is then removed from the camera.

The roll I4 is unwound and the films I6 and I8 are then separated and developed independently of one another. The developed films I6 and I8 are then used for printing colored pictures according to known processes.

According to the form of the invention shown in Figs. 7 to 9 the construction of the color separation film is somewhat similar to that previously described and consists of a roll of film having a backing sheet I5. Superimposed upon the backing sheet I5 there is mounted a strip of panchromatic film I6 with its emulsion side I! directed away from the backing strip I5. Superimposed upon the panchromatic film IB' there is mounted a strip of Verichrome (orthochromatic) film I8 with its emulsion side I9 directed towards the emulsion side I! of the panchromatic film I6.

This form of the invention difiers from the previous form of the invention'in the manner in which the ends of the strips of film I6 and I8 are mounted upon the backing strip I5. To accomplish this modified form of mounting the strip of Verichrome (orthochromatic) film I8 is formed with reduced shoulders forming a tongue 25 at each end of the strip of film I8. The strip of panchromatic film I6 i formed at points spaced slightly inwards from its ends with slots 28. These slots 26 are substantially equal in length to the width of the tongues 25 formed upon the ends of the strip of film I8. The tongues 25, in assembling the films I6 and I8, are threaded through the slots 25, as shown staples 20, and these joined in Fig. 9, to project slightly beyond the end of the strip of film It.

A strip of adhesive tape 21 is provided for each of the ends of the films. Each tape 21 is secured to the exposed face of the strip of Verichrome (orthochromatic) film I8, the exposed end of the strip of panchromatic film I6, the exposed end of the tongue 25 and the face or the backing strip I5 for securely mounting the strips of film in position on the backing strip.

In other respects this form of the invention is similar to that previously described, and like reference numerals are used to identify like parts in each of the several views.

While I have illustrated and described the preferred embodiments oi! my invention, it is to be understood that I do not limit myself to the precise construction herein disclosed and the right is reserved to all changes and modifications coming with the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

1. A roll of color separation film for box cameras and the like, comprising a three layer roll, one of said layers being an opaque protective lead and backing strip, the adjacent layer being a panchromatic film, and the next layer being an orthochromatic film, and means for mounting said films securely in position upon said backing strip, comprising tongues formed on the ends of one of said films and engageable through complementary slots formed in the ends of the other of said films, and means for securing the interengaged ends in position upon the backing strip.

2. A roll of color separation film for box cameras and the like, comprising a three layer roll. one of said layers being an opaque protective lead and backing strip, the adjacent layer being a panchromatic film, and the next layer being an orthochromatic film, and means for mountin said films securely in position upon said backing strip, comprising tongues formed on the ends of one of said films and engageable through complementary slots formed in the ends of the other of said films, and means for securing the interengaged ends in position upon the backing strip, comprising strips of adhesive tape secured partially to said interengaged ends and partially to said backing strip.

3. A roll of color separation film for box cameras and the like, comprising a layer of opaque protective lead and backing strip, superimposed layers of color sensitive fihn positioned on said backing strip, tongues formed on the ends of one of said films and engageable withcomplementary slots formed in the ends of the other of said films connecting the films ageinst relative movement, and strips of adhesive tape secured partially to the interengaged ends of said films and partially to the adjacent face of said backing strip adjacent the interengaged ends for mounting said films in position strip.

on said backing ADOLPH SCHUSTERMAN. 

